My goal of posting current versions every month almost worked. The December 29, 2015 version is in the usual place. (But I am only posting it on January 1, 2016 — happy new year!)

As usual, there are many small changes, but nothing that should particularly make you want to download it if you have the previous version. And as always, I have a big list of emails, responses, etc. that I want to respond to, and a number I intend to respond to fairly soon.

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